> I have yet to hear a story from someone who had some sort of scan done, found something worth to take a look at that turned out to be nothing and that, for some strange reason, was significantly affected by that.

Silly comment. They tell you there's a 16% false positive rate. Maybe you don't know any of these people, but I'd certainly be willing to bet money that some of them got worried sick about it.

In addition, an older case is prostate cancer. At least in the older days, they would do painful procedures that left the patient with significantly lower quality of life, when in fact, many men with prostate cancer die of something else. Nowadays they're a little smarter about it.